Put very simply, Satan's power in the world is everywhere. Yet wherever men and women walk in the Spirit, sensitive to the anointing they have from God, that power of his just evaporates. There is a line drawn by God, a boundary where by virtue of his own very presence Satan's writ does not run. Let God but occupy all the space himself, and what room is left for the evil one?

The collected works of Watchman Nee (ed. 1993)